MediaWiki:SmoothiesDebtCalculator.js

(function () {


function parseAmount(value) {

    value = value
        .toLowerCase()
        .replace(/,/g,"")
        .trim();


    if (value.endsWith("b")) {
        return Number(value.slice(0,-1)) * 1000000000;
    }


    if (value.endsWith("m")) {
        return Number(value.slice(0,-1)) * 1000000;
    }


    if (value.endsWith("k")) {
        return Number(value.slice(0,-1)) * 1000;
    }


    return Number(value) || 0;

}



function saveValues() {

    let fields = [
        "pkp-amount",
        "dp-price",
        "dp-amount",
        "credits-price",
        "credits-amount"
    ];


    fields.forEach(function(id){

        let input = document.getElementById(id);

        if(input){

            localStorage.setItem(
                "smoothie-" + id,
                input.value
            );

        }

    });

}



function loadValues() {

    let fields = [
        "pkp-amount",
        "dp-price",
        "dp-amount",
        "credits-price",
        "credits-amount"
    ];


    fields.forEach(function(id){

        let input = document.getElementById(id);

        let saved = localStorage.getItem(
            "smoothie-" + id
        );


        if(input && saved !== null){

            input.value = saved;

        }

    });

}



function calculateDebt() {


    let pkp =
        parseAmount(
            document.getElementById("pkp-amount").value
        );


    let dp =
        parseAmount(
            document.getElementById("dp-price").value
        )
        *
        parseAmount(
            document.getElementById("dp-amount").value
        );


    let credits =
        parseAmount(
            document.getElementById("credits-price").value
        )
        *
        parseAmount(
            document.getElementById("credits-amount").value
        );


    let total = pkp + dp + credits;


    document.getElementById("total").innerHTML =
        Math.floor(total).toLocaleString() + " PKP";


    let mercherFee = total * 0.08;


    document.getElementById("mercher-fee").innerHTML =
        Math.floor(mercherFee).toLocaleString() + " PKP";

}



function createCalculator(){


    let pkp = document.getElementById("pkp-inputs");
    let dp = document.getElementById("dp-inputs");
    let credits = document.getElementById("credits-inputs");


    if (!pkp || !dp || !credits) {
        return;
    }



    pkp.innerHTML = `

    <label>Amount</label>
    <input id="pkp-amount" type="text">

    `;



    dp.innerHTML = `

    <label>Trade Price (PKP)</label>
    <input id="dp-price" type="text">

    <label>Amount</label>
    <input id="dp-amount" type="text">

    `;



    credits.innerHTML = `

    <label>Trade Price (PKP)</label>
    <input id="credits-price" type="text">

    <label>Amount</label>
    <input id="credits-amount" type="text">

    `;



    // Remove image links from tab order
    document
    .querySelectorAll(".debt-calculator a")
    .forEach(function(link){

        link.setAttribute(
            "tabindex",
            "-1"
        );

    });



    document
    .querySelectorAll(".debt-item input")
    .forEach(function(input){

        input.addEventListener(
            "input",
            function(){

                calculateDebt();
                saveValues();

            }
        );

    });



    loadValues();

    calculateDebt();

}



mw.hook("wikipage.content").add(function(){

    createCalculator();

});


})();